Post on 31-Jan-2017
1 2015-06-18 issue 7Data is only for informational purpose. All specifications are subject to change without notice.
Knife gate valve RKS
2 2015-06-18 issue 7
Knife gate valve RKS
Stafsjö’s knife gate valve RKS is an isolating valve designed for low pressure systems in water and waste water applications, but it can also be used in other applications handling sludge, pellets or similar.
The RKS valve is a robust welded construction in stainless steel, available sizes ranges from 200x200 mm up to 1000x1000 mm. It is equipped with a gate in stainless steel and a sealing profile in Nitrile or brass. The glandbox is supplied with Stafsjö’s unique gland box packing, TwinPack™, to secure that no media reaches the surround-ing environment. The valve is modular designed and it can easily be provided with different actuators and accessories.
RKS is designed and manufactured according to Swedish stand-ards for pressure equipment and pipe systems: TKN 1987 and RN 1978.
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A1 A2 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000
200 x x x
250 x x x x
300 x x x x x x
350 x x x x x x
400 x x x x x x x
450 x x x x x x x x x x
500 x x x x x x x x x x
600 x x x x x x x x x x x
700 x x x x x x x x x x
800 x x x x x x x x x x
1000 x x x x x x x
2015-06-18 issue 7
Actuators
Manual Code Automatic Code
Hand wheel (HWR) Pneumatic cylinder (AC)
Chain wheel (CWR) Elektric motor (EM)
Design data
Sizes Flange drilling Face-to-face dimension Leakage rate Pressure test
200x200 - 1000x1000 Stafsjö manufacturing standard
Stafsjö manufacturing standard
The RKS knife gate valve is drip tight with a soft sealing profile.
Pressure tests are not performed on the body. Seat tightness test is only performed with soft sealing profile.
Other sizes on request
Maximum working pressure body at 20°C Maximum differential pressure in preferred direction at 20°C
Sizes bar Sizes bar
200x200 - 1000x1000 3 200x200 - 1000x1000 1
Basic equipment
A. Valve Body
Material Code Name
Stainless steel (E) EN 1.4404/AISI 316L
B. Gate
Material Name
Stainless steel EN 1.4301/AISI 304
C. Sealing profile
Material Code Maximum temperature °C
Brass (M) 200
Nitrile (N) 100
D. Box packing
Material Code Maximum temperature °C
TwinPack™ (TY) 260
Valve sizes (mm)
A1: Width boreA2: Hight bore
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A1 A2 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000
200 100 100 100
250 100 100 100 100
300 100 100 100 160 160 160
350 100 160 160 160 160 160
400 160 160 160 160 160 160 160
450 160 160 160 160 160 160 160 160 160 160
500 160 160 160 160 160 160 160 160 200 200
600 160 160 160 160 200 200 200 200 200 200 200
700 160 200 200 200 200 200 200 200 250 250 250
800 200 200 200 200 200 250 250 250 250 250
1000 250 250 250 250 250 250 250
A1 A2 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000
200 07.2 07.2 07.2
250 07.2 07.2 07.2 07.2
300 07.2 07.2 07.2 07.6 07.6 07.6
350 07.2 07.6 07.6 07.6 07.6 07.6
400 07.6 07.6 07.6 07.6 07.6 07.6 07.6
450 07.6 07.6 07.6 07.6 07.6 07.6 07.6 07.6 07.6 07.6
500 07.6 07.6 07.6 07.6 07.6 07.6 07.6 07.6 07.6 07.6
600 10.2 10.2 10.2 10.2 10.2 10.2 10.2 10.2 10.2 10.2 10.2
700 10.2 10.2 10.2 10.2 10.2 10.2 10.2 10.2 14.2 14.2 14.2
800 10.2 10.2 10.2 10.2 10.2 14.2 14.2 14.2 14.2 14.2
1000 14.2 14.2 14.2 14.2 14.2 14.2 14.2
200 x 200 - 500 x 800 Ø 315 Tr 26 x 5 200 x 200 - 300 x 450 Ø 225
600 x 400 - 600 x 900 Ø 400 Tr 32 x 6 350 x 250 - 500 x 800 Ø 320
700 x 500 - 1000 x 1000 Ø 520 Tr 40 x 7 600 x 400 -
2015-06-18 issue 7
Double-acting pneumatic cylinder (AC)
The table above gives recommended cylinder sizes at normal operation with 5 bar air pressure. For other operating conditions, please contact Stafsjö or your local representative for advice.
Electric motor (AUMA multi-turn) (EM)
Electric motors are mounted according to standard ISO 5210. The table above gives recommended motor sizes at normal operation. For other operating condi-tions, please contact Stafsjö or your local representative for advice.
The actuators are described in separate data sheets. For advice and information on other actuators or on ATEX-classified ones, please contact Stafsjö or your local representative.
Hand wheel (HWR) with rising stem Chain wheel (CWR) with rising stem
Size valve Size HWR Stem thread Size valve Size CWR
Larger on request
5
3
4
2
1
10
14
9
6
7
18
8
13
16
19
2015-06-18 issue 7
Part list
Pos Detail Material (Type)
1 Hand wheel Coated cast ironØ 200 - Ø 315 (EN-JL1040/GG25), > Ø 400 (EN-JL1030/GG20)
2 Yoke Coated steel (EN 1.0045)
3 Stem Stainless steel (EN 1.4104)
4 Stem nut Brass (CC333G)
6 Gate See equipment B
7 Top frame Stainless steel (EN 1.4404)
8 Gland Stainless steel (EN 1.4301)
Pos Detail Material (Type)
91) Box packning See equipment D
10 Valve body See equipment A
131) Sealing profile See equipment C
14 Guide strip HD-polyethylene
16 Gate guard,not for HW
Stainless steel (EN 1.4301)
18 Cylinder See data sheet
19 Rolling supports Stainless steel (EN 1.4460)1) Recommended spare parts
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B
FG
A2
C2
E
H
C1
K
A1
LA1xA2 - A1xA2 B C1 C2 E F G H K L
200x200 - 300x450 90
350x250 - 600x900 100
700x500 - 1000x1000 140
200x200 - 500x800 A1 + 110 A2 + 110
600x400 - 600x900 A1 + 120 A2 + 120
700x500 - 1000x1000 A1 + 130 A2 + 130
200x200 - 1000x1000 C2 X 0,5
200x200 - 500x800 315 F + A2 + 186
600x400 - 600x900 400 F + A2 + 195
700x500 - 1000x1000 520 F + A2 + 244
200x200 - 500x800 F + A2 + 76
600x400 - 600x900 F + A2 + 71
700x500 - 1000x1000 F + A2 + 78
L + A2 + 164
L + A2 + 203
L + A2 + 249
L + A2 + 356
L + A2 + 100
L + A2 +100
L + A2 + 111
L + A2 + 143
L + A2 + 143
2015-06-18 issue 7
Main dimensions
Dimensioner (mm)
Equiped with AC 100
Equiped with AC 160
Equiped with AC 200
Equiped with AC 250
Equiped with AUMA 07.2
Equiped with AUMA 07.6
Equiped with AUMA 10.2600x400 - 600x900
Equiped with AUMA 10.2 700x500 -
Equiped with AUMA 14.2
Main dimensions are only for information. Contact Stafsjö for certified drawings.
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Lb = 55 mm
A1 Lb1 Lb2 A2 Lh1 Lh2
200 135 135 200 135 135
250 107 106 250 107 106
300 124 122 300 124 122
350 105 105 350 105 105
400 117,5 117,5 400 117,5 117,5
450 104 104 450 104 104
500 114 114 500 114 114
550 104 103
600 113 111
650 120 120
700 110 110
750 117,5 117
800 111 108
Lb = 60 mm
A1 Lb1 Lb2 A2 Lh1 Lh2
600 114 113 400 120 120
450 106 106
500 116 116
550 105 105
600 114 113
650 122 121,5
700 112,5 111
750 120 118
800 110 110
850 117 116
900 112 108
Lb = 65 mm
A1 Lb1 Lb2 A2 Lh1 Lh2
700 112,5 113 500 118 118
800 112 111 550 108 106
1000 121,5 121 600 115 115
650 124 123
700 112,5 113
750 120 120
800 112 111
850 117,5 117,5
900 110 110
950 117,5 115
1000 121,5 121
Lb1L0
Lh1
Lh2
Lh2
Lb2 L0Lb1Lb2
L0L0
Lh1
Lh2
Lb
A1
A2
Sp
2015-06-18 issue 7
Flange drilling See page 2 for available sizes and combinations.
A1: Width bore
A2: Hight bore
L0: 20 mm
Lb1/Lh1: The distance between the corner hole and the adjacent hole.
Lb2/Lh2: The distance between the remaining holes, no matter number of holes.
Sp: Bolt size on the A1 top side
Sdf: Diameter of through going holes
No. of threaded holes = No. of holes per side minus 2 holes
Holes
A1 and A2 No. of holes per side Sp Sdf (mm)
200 3 M12 14
250 4 M12 14
300 4 M12 14
350 5 M12 14
400 5 M12 14
450 6 M12 14
500 6 M12 14
600 7 M12 14
700 8 M16 18
800 9 M16 18
1000 10 M16 18
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Further information is available on www.stafsjo.com
Globally active. Locally represented.AFRICA South Africa: Valve & Automation (Pty) Ltd, ASIA China: EBRO ARMATUREN (BEIJING) CO., LTD, India: Ebro Armaturen India Pvt. Ltd, Indonesia: Contromatic Prima Mandiri PT, Japan: SKC Co. Ltd, Malaysia: Precision Control SdnBnd, Philippines: EBRO ARMATUREN (PHILIPPINES) INC., Thailand: EBRO VALVES (Trading) Co. Ltd., Vietnam: EBRO VALVES (Thailand) Co., Ltd, AUS-TRALIA/OCEANIA Australia: EBRO ARMATUREN Pacific PTY. LTD, New Zeeland: H.J.Asmuss&Co.Ltd EUROPE Austria: EBRO ARMATUREN GmbH, Belgium: V.C.T. - Valve & Connector Technology n.v., Denmark: Valtor Industri A/S, Finland: Tecalemit Flow Oy, France: EBRO ARMATUREN, Germany: EBRO ARMATUREN Gebr. Bröer GmbH, Great Britain: EBRO Valves Ltd, Hungary: EBRO ARMATUREN Kft, Ireland: ESI Technologies Ltd., Iceland: Hédinn HF, Italy: EBRO VALVOLE SRL, The Netherlands: EBRO VALVES B.V., Norway: BAGGES AS, Poland: EBRO ARMATUREN GmbH, Portugal: AxFlow Comércio de Aquipamentos LDA, Russia: LesBumMash Ltd, Roitech and Sevkom, Spain: EBRO ARMATUREN ESPAÑA, S.L., Switzerland: EBRO Armaturen Est. & Co. KG, Sweden: Stafsjö Valves AB and Ahlsell Sverige AB, Turkey: EBRO ARMATUREN Otomasyon Sistemleri San ve Tic Ltd. Sti, Ukraine: EBRO ARMATU-REN GmbH Representative office Kiev NORTH AMERICA Canada: Armour Valve Ltd, USA: EBRO ARMATUREN USA Inc. SOUTH AMERICA Argentina: ESCO ARGENTINA S.A, Brazil: ELAN Equipamentos Industriais LTDA, Chile: Ebro Stafsjö Valves Chile Ltd For other countries, please contact us directly.
Stafsjö Valves AB Phone: +46 11 39 31 00 info@stafsjo.se A Bröer Group companySE-618 95 Stavsjö, Sweden Fax: +46 11 39 30 67 www.stafsjo.com